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Full Discussion: Creating a printer emulator to capture PDL/PCL data coming in on port 9100.
Special Forums IP Networking Creating a printer emulator to capture PDL/PCL data coming in on port 9100. Post 302389077 by transistor on Friday 22nd of January 2010 02:32:37 PM
Old 01-22-2010
Thanks, Corona.

I tried using Windump - a port of tcpdump - to see if I could catch anything. I set it to listen for incoming on port 9100 but couldn't see anything. (I could see traffic if I listened for other devices on the LAN.) This caused me to think that the stream might be interactive.

Any other ideas? I'll mess around with tcpdump/Windump between to laptops and see if I can understand how it's supposed to work.

---------- Post updated at 07:32 PM ---------- Previous update was at 06:49 PM ----------

Right. Two XP laptops.

Source: 192.168.3.3, with a generic/text printer driver pointing to 192.168.3.4, port 9100.
Dest: 192.168.3.4 (Hohner) running WinDump. WinDump listening to port 9100.

Here's what I got when I try to print "Hallo World!" from Notepad on source machine ...

Code:
E:\windump>windump -i 2 -A -f -q -t -X port 9100
windump: listening on \Device\NPF_{8071A9D5-8999-472A-85C5-B1E55ABFFC9E}
IP 192.168.3.3.1982 > HOHNER.9100: tcp 0
        0x0000:  4500 0030 6b7d 4000 8006 07f3 c0a8 0303  E..0k}@.........
        0x0010:  c0a8 0304 07be 238c 7ebb 2438 0000 0000  ......#.~.$8....
        0x0020:  7002 ffff 2dee 0000 0204 0550 0101 0402  p...-......P....
IP 192.168.3.3.1983 > HOHNER.9100: tcp 0
        0x0000:  4500 0030 6b83 4000 8006 07ed c0a8 0303  E..0k.@.........
        0x0010:  c0a8 0304 07bf 238c 3334 eff4 0000 0000  ......#.34......
        0x0020:  7002 ffff adb7 0000 0204 0550 0101 0402  p..........P....

It keeps repeating this and the print queue on source machine never clears. It looks like the source is expecting a response from dest.

Any ideas how to spoof a response from the "printer"?
Am I mad?
Last edited by transistor; 01-22-2010 at 03:46 PM.. Reason: Improved clarity - I hope!
 

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LEARN ABOUT REDHAT

gimpprint-mediatypes

GIMPPRINT-MEDIATYPES(7) 				      Gimp-Print Manual Pages					   GIMPPRINT-MEDIATYPES(7)

NAME

       gimpprint-mediatypes - Gimp-Print media types

DESCRIPTION

       Gimp-Print  supports  many  different  media  types,  which are printer type specific.  The option names are case sensitive.  Two names are
       listed for each resolution; the first (short) name is the mediatype, and the second (long) name is descriptive.	Not all  media	types  are
       supported on all printers.

MEDIA TYPES

   Epson and Lexmark (other than the 4076) inkjet printers
       Media Type     Description
       ------------------------------------------
       Plain	      Plain Paper
       PlainFast      Plain Paper Fast Load
       Postcard       Postcard
       GlossyFilm     Glossy Film
       Transparency   Transparencies
       Envelope       Envelopes
       BackFilm       Back Light Film
       Matte	      Matte Paper
       Inkjet	      Inkjet Paper
       Coated	      Photo Quality Inkjet Paper
       GlossyPhoto    Premium Glossy Photo Paper
       Luster	      Premium Luster Photo Paper
       Photo	      Photo Paper
       Glossy	      Photo Quality Glossy Paper
       Ilford	      Ilford Heavy Paper
       Other	      Other

       We  have  found	that glossy photo papers not specifically designed for Epson printers generally perform poorly in Epson printers.  The ink
       tends to pool on the paper, causing muddy shadows and possibly leaving ink on the printer rollers.  Use of  the	highest  quality  printing
       modes  (1440x720  highest quality and 2880x720 unidirectional) produces the best result on such papers, probably because printing is slower
       and there is more time for the ink to dry.

   Canon printers
       Media Type     Description
       -------------------------------------
       Plain	      Plain Paper
       Transparency   Transparencies
       BackFilm       Back Print Film
       Fabric	      Fabric Sheets
       Envelope       Envelope
       Coated	      High Resolution Paper
       TShirt	      T-Shirt Transfers
       GlossyFilm     High Gloss Film
       GlossyPaper    Glossy Photo Paper
       GlossyCards    Glossy Photo Cards
       GlossyPro      Photo Paper Pro

   PCL (Hewlett-Packard and Lexmark 4076) inkjet printers
       Media Type	Description
       ----------------------------------------
       Plain		Plain
       Bond		Bond
       Premium		Premium
       Glossy		Glossy/Photo
       Transparency	Transparency
       GlossyQD 	Quick-dry Photo
       TransparencyQD	Quick-dry Transparency

       PCL laser printers do not allow specification of any media type.

COPYRIGHT

       Copyright (C) 2001 Michael Sweet (mike@easysw.com) and Robert Krawitz (rlk@alum.mit.edu)

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as  published	by
       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       This manual page was written by Roger Leigh (roger@whinlatter.uklinux.net)

SEE ALSO

       gimpprint-color(7),   gimpprint-dithers(7),   gimpprint-imagetypes(7),	gimpprint-inktypes(7),	gimpprint-mediasizes(7),  gimpprint-media-
       sources(7), gimpprint-models(7), gimpprint-resolutions(7).

Version 4.2.4							    25 Nov 2002 					   GIMPPRINT-MEDIATYPES(7)
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